Graining tool



Jan., 9, 1923 K fr Mmmm; P. A. GSTALDER.

GRAINING TOOL.

FILED APR. le. 921.

lllatented mlara. tml..

eisiirnrn'e 'reen .application tiled .april le, 11931. Serial No.lfll''l.

i. o all whomtt may concer/lt.'

le it known that ll, PAUL d.. tirsfraiinnn, citizen of the llniterViltatee, residing at `Pittsburgh, in the county of Allegheny and imitateof Pennsylvania., have invented a cer tain new and useful Improvement ine@training 'lools,of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawings.

V'llhis invention relates to graining appliances and is primarilyconcerned with the construction of a tool adapted for use in producing astippled effect `on thesurface to be grained.

ln graining vto represent certain kinds of wood, it has been found thatan appearance similar to the natural grain may be secured by producing astippled effect upon the distemper coat. For stippling the surface to begrained, various tools have been em ployed, among them being brusheshaving comparatively stiff bristles, the surface being patted insuccessive regions by the side of the brush. ln employing such a tool,however, l have found that it is di'llicult to properly blend thedifferent regions treated to make a. continuous appearance. rtheoperation is tedious and the result not entirely satisfactory. j

@ne of the objects of my invention is the provision of a graining toolfor permitting a surface to be stippled with rapidity and uniformity. lleffect this by providing a rotary brush and means for limiting theappreach of the bristles to the surface treated, so that the brush maybear, with equal force, upon the surface irrespective of the pressureplaced upon the operating handle.

ln carrying out my invention l employ a tool comprising a rotatablebrush, having a suitable handle for supporting the brush upon its axis,and for permitting the tool to be moved across the surface to begrained. Furthermore, l provide narrow disks, associated with the brush,for limiting the ap proach of the bristles to the graining surface, sothat the bristles bear with equal pressure irrespective of the pressureplaced upon the handle, while the narrow tread of the disks preventstheir forming objection able lines on the surface.

'llhe means for accomplishing the above objects will be more fully setforth in the following description, which relates to the drawings, andthe essential characteristics of my invention will be set forth in theclaim.

Vin the drawings, Fig. l is an elevation of a graining tool embodyingfeatures of my invention; l:l"ig. l2 is a perspective view of the toolshown in llig. 1; lfig. 3 is a section taken through the, axis of thebrush and showing one forni of brush construction.

.llesignating the parts shown in the drawings by the use of referencecharacters, in the various gures, .l have shown a brush 10 as comprisinga series of bristles which protrude outwardly from and are secured to asha-ftor core 11.` This brush shown in Fig. 3, as having a twisted wirecore which acts as a supporting shaft, but for purposes of producing astippled effect upon the sur face to be grained, it is not essentialthat this form of construction be employed. The main requisites are thatthe bristles be close together and protrude beyond the periphery of aset of disks 14 which will be hereinafter described.

rlhe ends of the shaft 11 are journaled in bearings which 'may comprisea pair of arms 12 which straddle the ends of the brush and are mutuallyjoined to the handle 13. ln lig. 2 ll have shown a handle as comprisinga one-piece member which is bent into a itl-shape. The ends of suchmember 'may comprise the shaft supporting arms, and the intermediateportion thereof may comprise the handle.

To limit the approach of the brushes to the surface to be grained, llprovide a pair of stiff disks .11i which are positioned at cach end ofthe brush and adjacent the shaft supporting arms 12. ln Fig. 1 the brushis shown in use upon a surface 15, and in such position it will be notedthat the bristles are bent in various directions on that part of thetool which is adjacent the graining surface. In this figure the disk 14Eis shown as being in peripheral engagement with the surface 15, and thehandle is shown as being in a position convenient for producing thestippling operation. To prevent the disk from leaving a line upon. thedistemper coat, l make the disk very thin or bevel the peripherythereof, as at 15, almost to a cutting edge, which edge possesses asuficient degree of keenness to prevent the formation of aline and atthe same time to avoid cutting the surface to be grained. rllhe disksmay well be of metal ies over thev surface to be grained after thedistemper coat has been applied. During this operation, pressure isexerted on the handle of the brush, until the disks 14 may abut thegraining surface, whereby the approachv of the bristles is definitelylimited.

i As the tool` is drawn over the surface, the bristles' on the near sideof the tool successively slap the surface, so to speak, and then as theturningnrof the tool carries them under the core, they lie along` thesurface, and finally as they straighten out, give a slight snapping orkicking action -to the surface. The result is that while the stippledcoat produced has no appearance of successive regions therein, there issome variation or individuality due to the kicking action referred to,which varies With the speed and pressure on the handle.

By making the core materially smaller than the bearing,Y disks, as shownin Fig. 3, the bristles bend in a somewhat spiral direction, producingthe effect described, and Without either breaking them or reducing theirresilience.

Having thus described my invention, I claim: f

In a raining` tool, the combination of a cylindrical bristle brush, ahandle pivotally mounted on said brush for rollinpY the same along thesurface to he `grained, discs secured to the brush at the ends thereof,said discs being adapted to limit the approach of the bristle and brushto the surface to be treated, said discs comprising` membersperipherally sharpened to prevent marks upon the surface to be grained.the discs having' a materially less diameter than that of the brush tocause the bristles to kick as the brush rolls over the surface to begrained.

In testimony whereof, l hereunto aliix my signature.

PAUL A. GSTALDER.

